摘要
热压烧结制备了Al2O3／TiC／Y－TZP陶瓷复合材料，研究了Y－TZP含量对该材料的组织结构、力学性能和耐磨性能的影响。随Y－TZP含量增加，复合材料的耐磨性提高，弯曲强度σf和断裂韧性KIC均比Al2O3－TiC提高1倍，分别达到1054MPa和11．65MPa·m1／2。试验结果表明，Al2O3／TiC／Y－TZP复合材料的强韧化机理主要为Y－TZP的应力诱发ZrO2相变增韧、裂纹偏转和晶粒细化。
The Al2O3/TiC/Y-TZP ceramic composites were made by hot-pressing. The effects of Y-TZP contents on microstructures mechanical properties and wear resistance of Al2O3/TiC/Y-TZP were studied. Results showed the wear resistance was greatly improved. Flexure strength (σf) and fracture toughness (KIC) were almost two times as Al2O3/TiC matrix and they were respectively 1054 MPa and 11. 65 MPa·m1/2. The experimental results also showed that the strengthening and toughening mechanism of Al2O3/TiC/Y-TZP composites were ZrO2 trans formation toughening, crack deflection and fine grains.
出处
《机械工程材料》
CAS
CSCD
北大核心
1997年第6期35-37,共3页
Materials For Mechanical Engineering
基金
山东省教委资助
